When you're kissing, you are probably in the clouds, and you might be moving too fast, so try this...

try to kiss as slowly as you possibly can !

kiss her upper lip, and do it as if you were caressing them with your lips and toungue, same for the bottom lip... when you are comfortable enough to french; go sloooow, super slow... because you want to savor every moment, rubbing your tongues together... end with a kiss on their lower lip and savor it... no rush... this results in a fantastic kiss !